/*
 * Copyright 2019 the original author or authors.
 *
 * Licensed under the Apache, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at  http://www.gnu.org/licenses/lgpl-3.0.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jn.easyjson.core.util;

import java.io.ObjectStreamException;
import java.math.BigDecimal;

public final class LazilyParsedNumber extends Number {
    private final String value;

    /**
     * @param value must not be null
     */
    public LazilyParsedNumber(String value) {
        this.value = value;
    }

    @Override
    public int intValue() {
        try {
            return Integer.parseInt(value);
        } catch (NumberFormatException e) {
            try {
                return (int) Long.parseLong(value);
            } catch (NumberFormatException nfe) {
                return new BigDecimal(value).intValue();
            }
        }
    }

    @Override
    public long longValue() {
        try {
            return Long.parseLong(value);
        } catch (NumberFormatException e) {
            return new BigDecimal(value).longValue();
        }
    }

    @Override
    public float floatValue() {
        return Float.parseFloat(value);
    }

    @Override
    public double doubleValue() {
        return Double.parseDouble(value);
    }

    @Override
    public String toString() {
        return value;
    }

    /**
     * If somebody is unlucky enough to have to serialize one of these, serialize
     * it as a BigDecimal so that they won't need Gson on the other side to
     * deserialize it.
     */
    private Object writeReplace() throws ObjectStreamException {
        return new BigDecimal(value);
    }

    @Override
    public int hashCode() {
        return value.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof LazilyParsedNumber) {
            LazilyParsedNumber other = (LazilyParsedNumber) obj;
            return value == other.value || value.equals(other.value);
        }
        return false;
    }
}